thank you reef monkey. that clears up a lot. so what your saying is the most important aspect is the spectrum? get 10000k for best growth. what about the wavelength?
LFS is telling me i need to keep my lights at a range of 420-480. is that the same as 10000k? i just looked at some threads and some are using LEDs. can LEDs reach 10000k-20000k? sorry for the questions, just trying to learn.
